The first thing I would do to proceed is to try sumo's. You could be just better built to pull that way. If that doesn't pan out, PM Steve on how to fix the hips too low issue in conjunction with shoulders too far over the bar. As you stated, shoulders too far forward is also a big problem as the bar will get away from you as you pull the bar up to your knee. This issue may be a clue that sumos are betetr suited to your build. I really hope you find they are!